/**
* \brief Read a single color from the graphical memory
*
* Use this function to read a color from the graphical memory of the
* controller.
*
* Limits have to be set prior to calling this function, e.g.:
* \code
* ili9341_set_top_left_limit(0, 0);
* ili9341_set_bottom_right_limit(320, 240);
* ...
* \endcode
*
* \retval ili9341_color_t The read color pixel
*/
ili9341_color_t ili9341_read_gram(void)
{
uint8_t red, green, blue;
ili9341_send_command(ILI9341_CMD_MEMORY_READ);
/* No interesting data in the first byte, hence read and discard */
red = ili9341_read_byte();
red = ili9341_read_byte();
green = ili9341_read_byte();
blue = ili9341_read_byte();
ili9341_deselect_chip();
return ILI9341_COLOR(red, green, blue);
}
/**
* \brief Copy pixels from the screen to a pixel buffer
*
* Use this function to copy pixels from the display to an internal SRAM buffer.
*
* Limits have to be set prior to calling this function, e.g.:
* \code
* ili9341_set_top_left_limit(0, 0);
* ili9341_set_bottom_right_limit(320, 240);
* ...
* \endcode
*
* \param pixels Pointer to the pixel buffer to read to
* \param count Number of pixels to read
*/
void ili9341_copy_pixels_from_screen(ili9341_color_t *pixels, uint32_t count)
{
uint8_t red, green, blue;
/* Sanity check to make sure that the pixel count is not zero */
Assert(count > 0);
ili9341_send_command(ILI9341_CMD_MEMORY_READ);
/* No interesting data in the first byte, hence read and discard */
red = ili9341_read_byte();
while (count--) {
red = ili9341_read_byte();
green = ili9341_read_byte();
blue = ili9341_read_byte();
*pixels = ILI9341_COLOR(red, green, blue);
pixels++;
}
ili9341_deselect_chip();
}
* \section compinfo Compilation Info
* This software was written for the GNU GCC and IAR for AVR.
* Other compilers may or may not work.
*
* \section contactinfo Contact Information
* For further information, visit
* <A href="http://www.atmel.com/">Atmel</A>.\n
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#include <asf.h>
/** Table of primary and secondary display pixel colors */
const ili9341_color_t color_table[] = {
ILI9341_COLOR(0, 0, 255), ILI9341_COLOR(0, 255, 0),
ILI9341_COLOR(255, 0, 0), ILI9341_COLOR(255, 255, 0),
ILI9341_COLOR(255, 0, 255), ILI9341_COLOR(0, 255, 255)
};
/** Number of colors stored in the \ref color_table array */
#define COLOR_TABLE_SIZE (sizeof(color_table) / sizeof(color_table[0]))
/** Display background color when clearing the display */
#define BG_COLOR ILI9341_COLOR(0, 0, 0)
/** Number of pixels for full screen */
#define TOTAL_PIXELS ((uint32_t)ILI9341_DEFAULT_WIDTH * ILI9341_DEFAULT_HEIGHT)
/** Create an array to hold a 40 x 40 bitmap */
ili9341_color_t bitmap[1600];